Certified Medical Assistant Practice Exam 2025 – Your All-in-One Guide to Exam Success!

The most appropriate immunization typically given to infants during their first year is the DTaP vaccine, which protects against Diphtheria, Tetanus, and Pertussis. This vaccine is part of the recommended immunization schedule that ensures infants receive crucial protection against these potentially severe diseases in their early months. The DTaP vaccine is generally administered in a series of shots starting at 2 months old and continues through the child’s first year, which is vital for building immunity during a time when infants are most susceptible to infections.

In contrast, the MMR vaccine, which protects against Measles, Mumps, and Rubella, is usually given later, around 12 to 15 months of age. The HPV vaccine is recommended starting at age 11 or 12, well beyond the infant stage, while the HepB vaccine is given at birth, but the question specifically asks for a vaccine associated with the first year in which multiple doses are administered during that timeframe. Thus, while HepB is also administered within the first year, the DTaP vaccine is notable for being part of a series that starts in infancy and continues into the first year, making it a key immunization for infants during this critical period.